[PATCH 1/2] Create a DIV_ROUND_CLOSEST macro to do division with rounding

[jochen.voss at googlemail.com (Jochen Voß)]

Hi,

2008/11/11 Andrew Morton <akpm at linux-foundation.org>:
> yup.  I wonder why the compiler doesn't do that for itself - is there a
> case where it will generate a different result?

The test program

    #include <stdio.h>
    int
    main()
    {
        signed int x = -1;
        printf("%d %d\n", x/2, x>>1);
        return 0;
    }

says

    0 -1

so it seems to make a difference.

All the best,
Jochen
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